THE FISH THAT MADE FRIDAY NIGHT FISH FRIES SO POPULAR IS DISAPPEARING. THE LAKE MICHIGAN PERCH POPULATION HAS FALLEN 80 PERCENT SINCE 1990. PART OF THE REASON FOR THAT IS INVASIVE SPECIES AND OVER FISHING. AS WISN 12 NEWS CHRIS GLONINGER EXPLAINS NEW AT SIX - TECHNOLOGY RIGHT HERE AT HOME COULD MAKE UP FOR THE DEFICIT. TODAY'S CATCH: A WISCONSIN FAVORITE YELLOW PERCH. 0458 CLIP OF SCOOPING FISH GROWN...INSIDE. 0460 03:34 - 03:38 THIS IS A PIECE OF IT, HAVING THIS FISH THAT CAN EVEN BE RAISED IN YOUR BASEMENT. THAT'S AQUAPONIC TECHNOLOGY. THE SCIENCE IS EXPANDING THANKS TO GROWING POWER AND THE SCHOOL OF FRESH WATER SCIENCES HERE IN MILWAUKEE. WILL ALLEN IS TRYING TO PROVE IT'S COST EFFECTIVE AND CATCH THE EYE OF INVESTORS. 0460 03:49 - 03:51 THAT'S WHAT PEOPLE WHAT TO KNOW. CAN I MAKE MONEY? 0482 51:47-51:54 MOST OF THE TIME WITH PLANTS, IF YOU NOTICE A PROBLEM IT CAN BE FIXED - LIKE IF IT IS WILTING, YOU NEED MORE WATER. WITH FISH, IT IS A DIFFERENT STORY. 0487 59:54 - 59:59 ONE OF THE HARDEST THINGS TO CONTROL WITH THESE GUYS, IS THE AMOUNT OF WASTE INSIDE THE TANK. 0465 18:38 - 18:43 YOU PUT IT UP TO THE LIGHT. YOU CAN SEE IT IS A LITTLE BELOW 7.0, THAT'S WHERE WE WANT TO BE. EVERY DAY JESSIE PREPODNIK TESTS THE WATER QUALITY AND TEMPERATURE. 0465 20:45 - 20:55 OVER THE SUMMER IT WAS REALLY, REALLY HOT IN HERE BEFORE WE HAD FANS GO GET RID OF THE EXCESS HEAT. SO WHAT YOU CAN DO IN THAT SITUATION, IF YOUR LEVELS ARE HIGH, YOU SLOW THE FEED SCIENTIST FRED BINKOWSKI WANTS TO EXPAND WHAT'S DONE HERE. ONE TANK CAN'T MAKE UP THE DEFICIT FOR AN ENTIRE LAKE, BUT EACH ONE CAN HOLD ABOUT 600 FISH. THESE YELLOW PERCH WILL BE READY FOR

Hillary Clinton did not have a State Department email account while she served as America's top diplomat, a senior state department official said Monday, and instead used a personal email account during her four years on the job.